Samsung SCX-4200 Service Manual download pdf (Page 35)

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System Overview

Samsung Electronics

Service Manual

3-19

3.3 S/W Structure and Descriptions

3.3.1 Architecture

The following diagram shows the Engine Control System.

Fig 1. The architecture of the engine firmware

Main F/W of the printer controller

Print Interface Control Module

Engine Print Processing

Control Module

Engine Unit Control Module

Hardware Devices

& Mechanical Device

Power On

Initial

Engine Firmware

Device Units

Sensors signals

Fuser Unit

LSU

HVPS

Fan Unit

Motors

Solenoid &

Clutch

1 2 ... 30 31 32 33 34 35 36 37 38 39 40 ... 157 158

DIGITAL LASER MFP 1
ELECTRONICS 2
Continued 4
1. Precautions 6
1.2.1 Toxic material 7
1.2.3 Handling Precautions 8
Precautions 9
1.3 ESD Precautions 10
2. Product Specification 11
2.2.1 General Specifications 12
2.2.3 Scan Specification 13
2.2.2 Print Specification 13
2.2.4 Copy Specification 14
Product Specifications 15
2.2.6 Other Specification 16
3.1.1 Front View 17
3.1.2 Sensor 18
3.1.3 Control Panel 19
3.1.4 System Layout 20
3.1.4.1 Paper Feed Mechanism 21
3.1.4.2 Transfer Ass’y 21
3.1.4.3 Drive Ass’y 21
3.1.4.4 Fixing Part(Fuser) 21
3.1.4.5 Scanner Unit 22
System Overview 23
3.1.4.7 Toner Cartridge 24
3.2.1 CPU Part 25
- Size: 8Mbyte 26
- Max Frequency: 133MHz 26
3.2.2 Scan Part 27
3.2.3 Ope Pannel 27
3.2.4 Printer Section 28
3.2.4.1 ASIC 28
Chorus 2 Block Diagram 29
3.2.5 Copier Part 30
3.2.6 SMPS & HVPS 30
3.2.7 FUSER AC POWER CONTROL 34
Sensors signals 35
Solenoid & 35
3.3.2 S/W Overview 36
3.3.2.5 Paper Size 37
3.3.2.6 Paper Type 37
3.3.3.1 Print Mode 38
3.3.3.2 Paper Type 38
3.3.3.3 Paper Size 38
3.3.3.5 Elapsed Printing Time 38
3.3.3.8Environmental Index 39
3.3.4.1 LSU Ready Check 40
3.3.5.1 Transfer Roller 41
3.3.6.1 MHV 42
3.3.6.2 THV 42
3.3.11 Door Open 43
3.3.12 No paper 43
3.3.13 Checking Paper jam 44
3.3.13.1 Paper Jam 0 44
3.3.13.2 Paper Jam1 44
3.3.13.3 Paper Jam2 44
3.3.14 Out Bin Tray Full 44
3.3.15 Temperature 45
3.3.15.1 Open Heat Error 45
3.3.15.2 Low Heat Error 45
3.3.15.3 Over Heat Error 45
3.3.16 LSU Error 46
4. Alignment and Adjustments 47
4.2 Paper Path 48
4.3 Clearing Paper Jams 49
4.3.2 In the Paper Exit Area 50
4.3.4 In the Manual Feeder 51
4.5 Clearing the Memory 52
4.6 Clearing the Drum 52
Alignment and Adjustmens 53
4.9 Periodic Defective Image 54
4.10 Error Message 55
Releasing Plastic Latches 58
Front Cover 59
Cassette 59
Rear Door 60
Rear Cover 60
Harness Holder 61
(24V, 80mA) 61
Micro Switch 62
Right Side Cover 62
Left Side Cover 63
Scan Motor 64
Scanner Unit 64
Scan Upper Unit 65
Scan Lower Unit 65
Disassembly and Reassembly 66
5.8 OPE Unit 67
Middle Cover Unit 68
Fuser Harness 69
Fuser Joint Harness 69
Thermostat 69
Gear RDCN(25/15) 70
Thermister Harness 70
Thermister 70
5.11 Exit Roller 71
5.12 LSU 72
Drive Ass'y 73
Main PBA 74
Inlet Bracket 75
CRUM PCB 76
5.19 Transfer Roller 77
5.20 Feed Roller 78
Feed Gear1 79
Ass'y 79
Feed Roller1 79
Feed Roller 79
6.1.2 Vertical White Line 82
6.1.3 Horizontal Black Bands 83
6.1.4 Black/White Spot 83
6.1.5 Light Image 84
6.1.6 Dark Image or a Black 84
6.1.7 Uneven Density 85
6.1.8 Background 85
6.1.9 Ghost (1) 86
6.1.10 Ghost (2) 86
6.1.11 Ghost (3) 87
6.3.12 Ghost (4) 87
Digital 88
Digital Pri 88
6.2.1 White Copy 89
6.2 Copy Problems 89
6.2.2 Black Copy 89
6.2.3 Abnormal noise 90
6.3.1 Wrong Print Position 91
6.3.2 JAM 0 91
6.3.4 JAM 2 92
6.3.3 JAM 1 92
6.3.5 Multi-Feeding 93
6.4.1 Fuser Error 95
6.4.2 LSU Error 95
6.4.4 Paper Empty 96
6.4.6 Cover Open 97
6.4.9 No Power 99
Troubleshooting 100
Samsung Electronics 100
Service Manual 100
6.5 Toner Cartridge Service 101
Digital Printer 102
6.6.2 Abnormal Printing 105
6.6.3 SPOOL Error 106
7. Block Diagram 107
(SCX-4200/XEU) 108
Contents 108
8.1 Main Exploded View 109
8.4. Fuser Unit Exploded View 112
΁ΒΣΥΤ͑ͽΚΤΥ 117
9. Connection Diagram 124
Ⅰ. Introduction 125
Ⅱ. Main PBA 125
Ⅲ. OPE PBA 125
Ⅳ. SMPS PBA 125
Ⅰ. General Specification 126
Objectives 126
2-2. LBP CPU Serises 136
2-7. USB INTERFACE 142
Circuits 145
Timing Diagram 145
LED Timing for Color Reading 147
To Supply DC Bias Voltage 150
AC to DC and then 150
DC to DC Conversion 150
IV. SMPS & HVPS PBA 151
11 Reference Information 154
Reference Information 155

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Samsung SCX-4200 Service Manual Page 35

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